Campylomyza ambulata Ham & Bae, 2025, sp. nov.

Campylomyza ambulata sp. nov. Fig. 2 D – G Type material examined. Holotype: Korea • 1 ♂ (slide no. 19 AYa-11); Gyeongsangbuk-do, Yeongyang-gun, Yeongyang-eup, Gowol-gil, 23, National Endangered Species Restoration Center (NERC); 10–17 Apr. 2019; Y. J. Choi, H. G. Kim leg.; deposited in KU. Paratypes: Korea • 6 ♂♂ (slides no. 19 AY-4, 8, 9, 11, 12, 14, 19 AYa-6, 12); same data and deposition as holotype • 1 ♂ (slide no. 19 AZ-10); NERC; 3–10 Apr. 2019; Y. J. Choi, H. G. Kim leg.; deposited in KU • 1 ♂ (slide no. NIBRIN 0000919403); NERC; same data as for preceding; deposited in NIBR. Other material examined. Korea • 2 ♂♂ (slides no. NIBRIN 0000992627, NIBRIN 0000992628); Odae 2; 23 Apr. – 11 May 2019; D. Ham, S. Park leg.; deposited in NIBR • 1 ♂ (slide no. HDS-674); GW; 8 Nov. 2017; D. Ham leg.; deposited in KU • 1 ♂ (21 AE-2-2); GP; 28 Apr. – 5 May 2019; Y. J. Bae leg.; deposited in KU • 1 ♂ (21 AG-1-5); SJ 2; 8–24 Apr. 2020; W. G. Kim leg.; deposited in KU. Diagnosis. Campylomyza ambulata sp. nov. can be distinguished from other species in the flavipes group found in Korea through the following characteristics: 1) gonostyli curved anteroventrally, excavated ventromesally with denser setae towards the apex; 2) apical point small, short subtriangular (Fig. 2 E, ↓ 10); 3) dorsal processes strongly tapering anteriorly, moveable depending on the pressure (Fig. 2 E, ↓ 11); 4) shoulders of tegmen conspicuous (Fig. 2 E, ↓ 12); 5) parameral apodeme short. Measurements. Male adult (holotype): Body length 1.187 mm. Wing length 1.364 mm. Hind leg coxa 0.134 mm; femur 0.480 mm; tibia 0.500 mm; tarsomere I 0.290 mm; tarsomere II 0.133 mm; tarsomere III 0.112 mm; tarsomere IV 0.071 mm; tarsomere V 0.058 mm. Description. Male adult (holotype). Head. Postocular bristles 3–5. Antenna with 12 flagellomeres. Neck of fourth antennal flagellomeres as long as node. Node with one complete and two incomplete crenulate whorls with sensory hairs, two incompletely collar-shaped sensilla distally. Palpus 4 - segmented; fourth segment longest. Thorax. Preepisternum with eight setae. Wing length to width ratio 2.28, AntC ending beyond R 4 + 5 but before reaching M 4; ApicR 1 3.46 × length of Rs; CuA separated. Tarsomere I longer than tarsomere II. Claws sickle-shaped, toothed; empodia longer than claws, pubescent. Terminalia. Tg 9 tapering towards apex with five fine setae apically. Ventral emargination U-shaped; ventromedial portion of gonocoxites slightly pronounced (Fig. 2 D, ↓ 8). Gonostyli with moderately convex apical margins, excavated ventromedially, narrowly rounded apically. Dorsal transverse bridge broadly rounded apically, extending beyond ventrobasal margin (Fig. 2 D, ↓ 9). On tegmen, apical points small, subtriangular, lamellate (Fig. 2 E, ↓ 10), dorsal processes long, strongly tapering towards apex beyond midlength, blunt apically (Fig. 2 E, ↓ 11). Tegmen shoulders well-developed (Fig. 2 E, ↓ 12), Parameral apodeme short (Fig. 2 E, ↓ 15). Variation. We observed significant variation concerning apical points and tegmen shoulders (Fig. 2 F – G). Apical points bulged with round serrated surfaces (Fig. 2 G, ↓ 13); Shoulders inconspicuous, when almost in the same position or lower than apical points of tegmen (Fig. 2 G, ↓ 14). Dorsal processes moveable apically. Etymology. The species epithet ambulata is derived from the Latin word ambulātus, which means ambulatory, referring to the movable nature of the dorsal processes.